Encrypt String In Program?
Dec 12, 2009Is it possible to encrypt string in VB.NET, so user won't be able to see it, when he opens program with hex editor, or something like that.
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.net - How To Encrypt A String
May 27, 2012Parameters.ReferencedAssemblies.Add("System.dll")
Parameters.ReferencedAssemblies.Add("System.Data.dll")
Parameters.ReferencedAssemblies.Add("System.Windows.Forms.dll")
is a way to encrypt "systems.dll" in the add() value?
something like Add(Char64+char45+...) or any method???
Dim Version = New Dictionary(Of String, String)
Version.Add("CompilerVersion", "v2.0")
[Code]...
How To Encrypt Any Given String
Feb 8, 2011I made this program to encrypt any given string, I am getting an error that prevents this from being finished.
Public Class Form1
Dim Holder As string
Dim Pass = "Za029fjao"
Dim Helper As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Holder = TextBox1.Text
Helper = Holder + Holder * Pass
Textbox2.text = Helper
End Sub
End Class
All I want to do is multiply 2 strings (is that possible?). The error says that string cannot be converted into double...
AES Encrypt Decrypt String?
Jan 2, 2010i need a standard way of encrypting a string and decrypting it using AES. I am aware of the Cryptography class, however almost every example creates a class to do the encryption,If .Net already has this implemented and ready to use why would we create classes for encryption and decryption, isn't it as simple as calling the encrypt method of the class or decrpyt and passing in the text. Unless everyone is wanting to centralize the code. But even then i see so many different examples from File,Data Protection etc..
View 10 RepliesEncrypt A String Via 128+-bit Encryption?
Apr 23, 2011I am not sure if there is such thing in VB.NET via 128-bit Encryption or more. [code]...
View 12 RepliesEncrypt Pdf File String?
Feb 4, 2011I have a page that has a few text boxes on it and are filled based upon a persons information. Like Name, telephone number, address etc
The data is stored in an Access DB.
I want to add a check box and have a label beside it that if it's checked it shows a hyperlink to a pdf file, if its not checked the link disappears, so toggle between the two.
Here's the check box I have so far, which isn't much:
<br><input type=checkbox name="Password" value="<%=oRs("Password")%>" size=40> Check to show PDF File: <a href="<%=oRs("Password")%>"><%=oRs("Password")%></a><br><br>
I need this hyperlink/ string to be encrypted based upon the persons name, so each person has its own pdf file and no one can just guess anothers pdf file and have access to it....
The pdf file will be stored in a virtual directory within the site.
I don't know Vb or asp, and I'm doing this all in notepad ++
How To Encrypt / Decrypt A String
Nov 2, 2011how to encrypt / decrypt a string in VB.Net.I followed the example given here and wrote the following code (below). There's a text box, an "encrypt" button, and a "decrypt" button. The idea is to type something into the text box ("like 'hello world'"), click "encrypt", and see the encrypted version appear in the text box. Clicking "decrypt" should then take you back to the original string.
But when I try to encrypt I get an error when I try to "FlushFinalBlock". The error is: "Length of the data to encrypt is invalid".The "decrypt" part is a total shot in the dark, as the example quoted above only deals with encryption, not decryption. I'm sure it's wrong, but since I can't get "encrypt" to work I haven't tested it yet.
Imports System.Data.SqlClient
Imports System.IO
Imports System.Security.Cryptography
Public Class Form1
[code]....
How To Encrypt Query String
Nov 20, 2010How to encrypt query string in vb.net ?
View 2 RepliesCode For Encrypt / Decrypt String
Nov 12, 2009i have found a few encrypt/decrypt tutorials online but either they dont work or they only work when the application is running so if i encrypt a string using some code i find and save it (in its encrypted form) and then restart the application and enter the saved encrypted string into a textbox and run the decrypt code it wont decrypt it. i don't understand why en/de-cryption is so hard or why there are so little working examples online. could someone be so kind and show me some code that can let me en/de-crypt a string even if i restart the application or use it on a different computer? and doesn't show the weak key errors all the time.
View 3 RepliesEncrypt (using Rijndael) A String To A File?
Dec 16, 2009I've attempted using code snippets as a test to encrypt a string, save it to a file & the reload it back, decrypting it. I consistently get a "Padding is invalid and cannot be removed." error on decrypting the string.
View 3 RepliesEncrypt A String Using AES 256-bit Encryption With A Custom Key
Jul 28, 2009I need some help with encrypting a string. I want to encrypt a string using AES 256-bit encryption with a custom key. How can I go about doing this?
View 3 RepliesHash - Encrypt A String Using HmacSHA256 In .NET?
May 8, 2009I need to create a keyed hash for a string of XML to send to a 3rd party. This is the code I am using but it is producing a different hash then the example the 3rd party has sent me.
Public Shared Function HashString(ByVal StringToHash As String) As String
Dim myEncoder As New System.Text.UTF32Encoding
Dim Key() As Byte = myEncoder.GetBytes(My.Settings.PortalHASH)
Dim XML() As Byte = myEncoder.GetBytes(StringToHash)
[code]....
It needs to be base-64 encoded, which is why I have the last line.
How To Encrypt And Decrypt Password String
Jun 25, 2009I want to encrypt all users' password that stored in database, but also i need to able to decrypt them.How can i do that?Because i try using MD5 method and only get one way ticket
View 4 Replies[2005] Encrypt String In VB - Decrypt In PHP
Feb 23, 2009I need to be able to encrypt a string in VB.Net 2005 and then be able to decrypt it using PHP on a web server.
PHP offers a variety of options - the best seeming to be mcrypt() but I can't see (easily) a way of encrypting the string in VB.Net
Encrypt A Line Of Code In The Program
Apr 4, 2011I'm trying to make a updater for my program at first i tried putting a password on the files folder then users can download the new zip file when its updated but when they first time install it wont have the password on it so i then decided not to use a password and am wondering how would i encrypt a line of code in the program? its the line that contains the database info so obviously i don't want my users to see that.
View 9 RepliesEncrypt Database And Using Data In Program
Mar 29, 2010My database is going to contain personal data. (such as contact details, names, password, etc...) This is what I need:
1) I need to encrypt the database
2) However, i will also need to be able to use it in my vb.net program.
To expand on my second point, i will need to be able to display the data (non-encrypted, obviously), and i will need to be able to compare user inputted data to the database data (like, i will be using datasets, so, IF txtUsername.text = ds.tables(0) ...)
[Code]...
Encrypt A String Using RijndaelManaged And Using PKCS5 Padding?
Oct 18, 2010I use the following code to initialize encryption...
[Code]...
So I don't think there is a method for PKCS5. Is there any way to add it, or do I need to write an encryption method myself? If so - how do I write that? Is there a reliable DLL that will support it?
Encrypt And Decrypt Connection String In XML File?
Mar 4, 2010I want to save my connection string in XML file.How to do that?How to encrypt and decrypt that file using VB.Net
View 2 RepliesVS 2008 - Encrypt String Using ECDSA Algorithm?
May 28, 2009Any example code to encrypt a string using the new ECDSA algorithm?
View 1 RepliesMake A Small Program To Encrypt Files Using AES
Apr 11, 2009i am trying to make a small program to encrypt files using AES, and then have the password from the AES encrypted using RSA for its use of public keys. i've got the AES part working fine and i found a good RSA tutorial here url....but after i encrypt the AES password (which is saved in a .txt file) using RSA, then i try to decrypt it again, it comes out as an empty .txt file!
View 4 RepliesMake A Program To Encrypt And Decrypt Messages?
Jul 22, 2010I want to make a program to encrypt and decrypt messages using a word cipher or random lettering(no duplicate letters) etc.
I've got 2 input boxes:
input text and keyword box
Two Buttons:
encrypt and decrypt
This is about all I have coded so far
Code:
Private Sub Encrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Encrypt.Click
Dim EncryptInput As String
[Code]....
I have a few guess how to do this (not 100%) but setting up some sort of array might be one (not sure if it's the easiest)
Edit: one thing for sure I want to be able to separate the characters in the keyword into the start of an array (if the array is the best option)
I don't necessarily need code, I just need some advisement on how to approach this with commands. I don't know too many commands (only remember some fortran)
VS 2008 Encrypt Program So People Can't Hack It?
Aug 9, 2009I am just wondering how to encrypt my program so people can't hack it. I have a program that has a spot where you can type in problems with the program and it will email it to me. But, when I release my program people hack my email and password that is used to send the problems.
View 7 RepliesWriting A Program That Will Encrypt Text Using AES Encryption
Feb 14, 2009I need some help with writing a program that will encrypt text using AES encryption. I'm not quite sure how to go about doing this.
View 1 RepliesVb 2005 : Encrypt The String Values Stored In The Code?
Jul 23, 2009encrypt the string values stored in the code.The problem is that when the code is compiled and the .exe file is generated, anybody can edit the .exe file with an text editor or another program and see the values.This is very important for me, because i have some password stored in string variables?
View 1 RepliesVB 2008 App - Encrypt Database Connection String In App.Config
Sep 21, 2011I know this topic has been addressed a million times but please help me out. I have read so many articles on HOW TO encrypt and decrypt the app.config file but I need to know WHEN and WHERE I should encrypt it.
The problem arose because we found an AppName.exe.config file on a users computer and the database username and password was clearly visible. I understand that the .config file gets created during the VB app install process and is used
by the application. I then learned about the aspnet_regiis.exe tool and ran it on the app.config file inside my VB project. I am guessing that was the wrong thing to do.
When I now install the app on user desktops, it gives an error stating failed to decrypt the connection string. Also, when one of my other developers attempts to open the project in his copy of visual studio on his computer, he receives an error when trying to access the setting portion of the project properties. We store all of our projects on a file server and any developer can access the projects via a mapped drive on their computer.
So how am I supposed to encrypt the .config file. If I can't encrypt the App.config file in the development environment, then I'm guessing I have to perform the encryption on the users PC during the install process? How do I do that? Or is that what I am supposed to do?
Just for reference, here is the aspnet_regiis command I ran.
aspnet_regiis.exe -pef "connectionStrings" S:ProjectsDevelopmentVB.netPTPUSourceCodePTPU -prov "DataProtectionConfigurationProvider"
One last thing, maybe it's my misunderstanding of the issue but if this problem has existed since .Net 2.0, why has an option not been built into the development studio to encrypt connection strings?. This would seem to be a very common issue, even their own dataset wizard creates connection strings that are clearly readable.
Encrypt Text To A Textfile(.txt) And Then Decrypt It In A Diff. Program?
Feb 21, 2009I am trying to encrypt text to a textfile(.txt) and then decrypt it in a diff. program.The encrypting part works fine.I have tried these functions in a textbox and they work perfectly, I get InvalidCastException when trying to decrypt from the .txt file.
[Code]...
Make Some Simple Program For Encrypt / Decrypting Message Using VB?
Jun 29, 2010i want to make some simple program for encrypt / decrypting message using VB, my problem was when i want to decrypt the message, the result was incorrect,
Code:
Dim decryptor As Integer = TextBoxhasilencrypt.Text
Dim privatekey As Integer = Labelprivatekey.Text
Dim modulus As Integer = LabelModulus.Text
[code]....
the logic error on the program was when the "power of" are odd
VS 2005 Encrypt Connection String In ALL Copies Of App.Config File?
Jan 19, 2011I have a question about the App.Config file. My understanding is that the connection string is stored within this file. I have setup my application so that the App.Config file is not only written to c:users<username>appdatalocal but also to c:users<username>appdataoaming. I plan to encrypt the connection string, my question at this point is will it encrypt the connection string in ALL copies of the App.Config file? It looks like at this point that the App.Config file is stored in two places on the hard drive.
View 2 RepliesWrite A Program To Decrypt And Encrypt Ceaser Cipher Or Ceaser Shift
Sep 7, 2009I am trying to write a program to decrypt and encrypt the ceaser cipher or ceaser shift (which ever you prefer using), and I really need help I don't even know how to start. I am hoping that someone on here can atleast help me to get started with writing the program.
View 4 RepliesAdd A "Master" Password For An Encrypt / Decrypt Program?
Jul 28, 2010I've written an encryption program that encrypts and decrypts selected files using a user-entered password as the encryption key.
Once en/decrypted, the user will be asked if they want to delete the file that was used, and, in the case of decryption, open the newly decrypted file.
My brother came up with an idea for this application yesterday that might save me a lot of grief should I forget a password. [code]...